Question

tìm x:

a)3+x=5

b)5x+1=2727:27

c)/x+2/=0

Answer 1

a ) 3+x=5

=> x = 5 - 3

=> x = 2

Vậy x = 2

b ) 5x + 1 = 2727 : 27

=> 5x + 1 = 101

=> 5x = 101 - 1

=> 5x = 100

=> x = 100 : 5

= > x = 20

Vậy x = 20

c ) /x+2/ = 0

=> x+2 = 0

=> x = 0 - 2

=> x = -2

Vậy x = -2

Answer 2

tìm x:

a) 3 + x =5

x = 5 - 3

x = 2

Answer 3

b) 5x+ 1 = 2727 : 27

5x + 1 = 101

5x = 101 - 1

5x = 100

x = 100 : 5

x = 20

Answer 4

c) / x + 2 / =0

x + 2 = 0

x = 0 - 2

x = -2